I´ve an old duffle bag as BOB. It hasn´t been put to action yet and probably wont.
FAK is cover by two kits. A bigger one in the vehicle and a pocket sized very basic kit for carrying in a pocket.
PSKs come in three different kit sizes. A small urban one (small tobacco tin) is for office, shopping and other urban activities on foot or by bicycle. A normal sized tobacco tin contains a bigger kit. I carry it when I can afford the size. When I go by motorcycle it usually sits in my backpack. My motorcycle kit is in the tin my swisskey came in. I always have in the right pocket where I also carry my motorcycle keys. A strong magnet holds the keys to the tin.
A vehicle kit is always with my motrcycle. It has same spare biulbs, fuses, fluids, tools and a special cloth for the visor. It is kept moist in a special container. The cloth is very useful when there are plenty of flying insects. It saved my day on many occasions (ephemera can be really bad).
I also have a portable HAM kit. It contains antennas, cable, AA-spares and 2 12 V nonspillable lead acid batteries. This kit is still in an early stage of evolution.
The kits stay where they belong. There are some items I EDC but do not put into the kits. These items are wallet, knives, multitools, GPSr phone and HAM rig.